Analyzer for analyzing moisture in ground conductance

An analyzer and conductivity technology, applied in the direction of material impedance, material resistance, etc., can solve the problems of easy scaling, safety, and high price, and achieve the effect of no interference in flow, small repeatability error, and low cost
CN1300576CInactive Publication Date: 2007-02-14DAQING OILFIELD CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
DAQING OILFIELD CO LTD
Publication Date
2007-02-14
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to a ground condcutive water cut analyzer for measuring water cut in oilfield export liquor. It is characterized by that the described analyzer includes an electric conductance sensor, excitation source generation circuit, voltage differential signal detection and voltage / frequency signal covnersion circuit. The described electric conductance sensor is formed from insulating tube, ring excitation, electrode mounted on the inner wall of insulating tube and ring measurnig electrode. Under the action of excitationsource generation circuit the excitation electrode can provide alternating current with constant magneitude, and under the action of voltage / frequency converter the pressure-different signal inputted by measuring electrode can be converted into frequency signal and outputted, then passed through power amplifier and transferred into secondary meter. Its measurement accuracy is high, repeatability and good consistency.
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Description

Technical field:

[0001] The invention relates to a primary meter used in the field of oilfield metering, in particular to a conductivity-type water content analyzer used for measuring the water content in crude oil transfusion liquid at each transfer station of an oil production plant. Background technique:

[0002] Water cut measurement is a key link in oilfield surface measurement. In the high water cut stage of oilfield development, there is an urgent need for metering devices that can accurately and reliably measure water cut. Currently used water content measurement instruments for oil-water two-phase flow include capacitive water-cut analyzers, vibrating tube densitometers and radioactive densitometers. The capacitive water-cut analyzer is suitable for the case where the oil is a continuous phase, and its accuracy is low when the water content is high, so it is rarely used at present; the radioactive density meter has reliable performance, but is expensive and has pot...

Claims

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